/Engine/Plugins/Experimental/Dataflow/Source/DataflowEditor/Public/Dataflow/DataflowGraphEditor.h
see(SDataprepGraphEditor for reference)
class SDataflowGraphEditor : public [SGraphEditor](API\Editor\UnrealEd\SGraphEditor)
FOnNodeDeletedM...
OnNodeDeletedMulticast
FOnSelectionCha...
OnSelectionChangedMulticast